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  4. Strongest Lewis acid among the following is

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Q. Strongest Lewis acid among the following is

Delhi UMET/DPMTDelhi UMET/DPMT 2008

Solution:

Lewis concept: According to this concept An acid is a substance which can accept a pair of electrons whereas a base is a substance which can furnish a pair of electrons to form a coordinate bond. In $PbCl _{2}$, lead is most electron deficient due to inert pair effect. Therefore, $PbCl _{2}$ is strongest Lewis acid.